<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>


    <head>
        <style>
            p {
                border-style: solid;
            }

            p.none {
                border-bottom-style: none;
            }

            p.dottde {
                border-bottom-style: dotted;
            }

            p.dashed {
                border-bottom-style: dashed;
            }

            p.solid {
                border-bottom-style: solid;
            }

            p.double {
                border-bottom-style: double;
            }

            p.groove {
                border-bottom-style: groove;
            }

            p.ridge {
                border-bottom-style: ridge;
            }

            p.inset {
                border-bottom-style: inset;
            }

            p.outset {
                border-bottom-style: outset;
            }
        </style>
    </head>
    <p class="none">无下边框。</p>
    <p class="dotted">点状下边框。</p>
    <p class="dashed">虚线下边框。</p>
    <p class="solid">实线下边框。</p>
    <p class="double">双线下边框。</p>
    <p class="groove">凹槽下边框。</p>
    <p class="ridge">垄状下边框。</p>
    <p class="inset">内陷下边框。</p>
    <p class="outset">凸出下边框。</p>
</body>

</html>